In the CTS welding crack test, the most important is to prepare the test specimen. Before the weldment is tested, it needs to meet certain requirements, otherwise the results obtained will not be meaningful. For example, the welding itself should be performed skillfully, and the components of the welding joint should be preheated to the required temperature. The selected test specimens should be inspected before the test to see if there is any weld defect or fracture on its surface.
The test consists of two main parts. First of all, the weld joint should be heated to a temperature of 950-1100℃ with a gas or electric welding torch, and hold for about 10 seconds. Secondly, a tension force is applied to the weldment of the specimen along the axial direction, and the degree of the tension force should not exceed 4 times the thickness of the specimen. After that, the size of the crack on the weldment of the specimen will be measured.
The test results of the CTS welding crack test should be compared with certain standards to determine the quality of the weld. Although there are some specific requirements in the different standards, in general, if the crack in the weldment of the test specimen exceeds 0.7 mm, the weldment can be considered qualified. If the crack exceeds 1.5 mm, the weldment can be considered unqualified.
The CTS welding crack test is very important for verifying the welding quality of welded components. It can also be used to evaluate the thickness of the welded components and measure the size of the cracks. Therefore, when testing a weldment, the CTS welding crack test should be conducted according to the requirements of the relevant standard. Only in this way can we get the reliable test results and determine the quality of the weldment.
